Q: Car runs but knocks

asked by on

My car starts but has a knocking noise. And every once in a while it idles out.

Hello. It sounds like there may be something inside the engine that is worn out or broken. This will cause a knocking noise and could also cause the truck to shut off. A compression test checks the compression of each cylinder, and can help to identify the problem in your engine. I would recommend having a certified mechanic inspect your vehicle’s knocking noise in order to have this issue resolved.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Car runs but knocks

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Truck stalls, starts back up after 2 min, stalls again starts back up after 2 min, now good for 1 month and it happens again.

Hello, thank you for writing in. Unfortunately you already know that the hardest part is going to be catching the problem when it occurs. With intermittent issues, you must wait to diagnose until it happens again, find damages or flaws...

Q: Key won't come out of the ignition, clicking sound while pressing brakes

The most common cause of this is a failing ignition switch. For the ignition switch to allow the key to turn, it looks for the car to be in Park or Neutral. When the car isn't in either of...

Q: My motor bogs down when going uphill but doesn't cut out just u have to kinda put ur foot in it to get up the hill

You will need to have the fuel pressure checked to see if the pump is giving the correct pressures and replace the pump in the fuel tank if it is not. If pressure is good then have computer tested for...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...